diff --git a/src/data.h b/src/data.h
index b64c13b19..fa815a4ee 100644
--- a/src/data.h
+++ b/src/data.h
@@ -345,6 +345,7 @@ class FMatrixS : public FMatrixInterface<FMatrixS>{
                 &col_data_[col_ptr_[i + 1]], Entry::CmpValue);
     }
   }
+
  private:
   // --- data structure used to support InitColAccess --
   utils::IIterator<SparseBatch> *iter_;
diff --git a/src/learner/dmatrix.h b/src/learner/dmatrix.h
index f7dbcb639..5786fe6a1 100644
--- a/src/learner/dmatrix.h
+++ b/src/learner/dmatrix.h
@@ -117,7 +117,7 @@ struct MetaInfo {
   }
   // try to load weight information from file, if exists
   inline bool TryLoadFloatInfo(const char *field, const char* fname, bool silent = false) {
-    std::vector<float> &weights = this->GetInfo(field);       
+    std::vector<float> &weights = this->GetInfo(field);
     FILE *fi = fopen64(fname, "r");
     if (fi == NULL) return false;
     float wt;
diff --git a/src/utils/random.h b/src/utils/random.h
index 18e40baff..689c6f860 100644
--- a/src/utils/random.h
+++ b/src/utils/random.h
@@ -74,11 +74,11 @@ inline int SampleBinary(double p) {
 template<typename T>
 inline void Shuffle(T *data, size_t sz) {
   if (sz == 0) return;
-  for (uint32_t i = (uint32_t)sz - 1; i > 0; i--){
+  for (uint32_t i = (uint32_t)sz - 1; i > 0; i--) {
     std::swap(data[i], data[NextUInt32(i + 1)]);
   }
 }
-// random shuffle the data inside, require PRNG 
+// random shuffle the data inside, require PRNG
 template<typename T>
 inline void Shuffle(std::vector<T> &data) {
   Shuffle(&data[0], data.size());